What are some advantages of including algae-eating fish in goldfish ponds?

Algae-eating fish keep goldfish ponds free of algae and help control algae outbreaks without the necessity of removing the water from the pond. Replacing the water is potentially fatal to the fish and disrupts the ecological balance in the pond, which takes substantial time to achieve.

Algae overgrowth in goldfish ponds is unattractive, is harmful to fish and can prevent pond equipment from functioning properly. Algae-eating fish called plecos, which can measure up to 12 inches long with a lifespan of 10 or more years, are useful for controlling algae in large goldfish ponds, while small catfish can control algae in smaller ponds.